Heart sound segmentation method, apparatus, electronic device, and readable storage medium

Abstract

A heart sound segmentation method includes: synchronously collecting physiological signals, the physiological signals include heart sound signals; obtaining a segmentation threshold corresponding to the heart sound signal, and segmenting the heart sound signal based on the segmentation threshold to obtain a first heart sound and a second heart sound; and determining a systolic duration and a diastolic duration of the heart sound signal according to the first heart sound and the second heart sound.

What is claimed is: 
     
         1 . A heart sound segmentation method, comprising:
 synchronously collecting physiological signals, wherein the physiological signals comprise heart sound signals;   obtaining a segmentation threshold corresponding to the heart sound signal, and segmenting the heart sound signal based on the segmentation threshold to obtain a first heart sound and a second heart sound; and   determining a systolic duration and a diastolic duration of the heart sound signal according to the first heart sound and the second heart sound.   
     
     
         2 . The heart sound segmentation method according to  claim 1 , wherein the physiological signal further comprises an electrocardiogram signal and a pulse signal, and before the obtaining the segmentation threshold corresponding to the heart sound signal, the method further comprises:
 determining a QRS wave peak point of the electrocardiogram signal, and using a time corresponding to the QRS wave peak point as a first time;   determining a trough point of the pulse signal, and using a time corresponding to the trough point as a second time;   determining a first zero crossing point and a second zero crossing point of the pulse signal, using a time corresponding to the first zero crossing point as a third time, and using a time corresponding to the second zero crossing point as a fourth time;   determining a first threshold corresponding to the first time and the second time, and determining a second threshold corresponding to the third time and the fourth time; and   using the first threshold and the second threshold as segmentation thresholds.   
     
     
         3 . The heart sound segmentation method according to  claim 2 , wherein the determining the first threshold corresponding to the first time and the second time comprises:
 obtaining or determining a heart sound envelope signal corresponding to the heart sound signal;   using a heart sound peak value of the heart sound envelope signal between the first time and the second time as a first heart sound peak value; and   adjusting the first heart sound peak value based on a preset adjustment coefficient to obtain the first threshold, wherein the first threshold is less than the first heart sound peak value.   
     
     
         4 . The heart sound segmentation method according to  claim 2 , wherein the determining the second threshold corresponding to the third time and the fourth time comprises:
 obtaining or determining a heart sound envelope signal corresponding to the heart sound signal;   using a heart sound peak value of the heart sound envelope signal between the third time and the fourth time as a second heart sound peak value; and   adjusting the second heart sound peak value based on a preset adjustment coefficient to obtain the second threshold, wherein the second threshold is less than the second heart sound peak value.   
     
     
         5 . The heart sound segmentation method according to  claim 1 , wherein the segmentation threshold comprises a first threshold and a second threshold, and the segmenting the heart sound signal based on the segmentation threshold comprises:
 obtaining or determining a heart sound envelope signal corresponding to the heart sound signal;   using a duration window in which a signal value of the heart sound envelope signal is greater than the first threshold as a first duration window;   using a duration window in which the signal value of the heart sound envelope signal is greater than the second threshold as a second duration window; and   using the heart sound signal within the first duration window as the first heart sound, and using the heart sound signal within the second duration window as the second heart sound.   
     
     
         6 . The heart sound segmentation method according to  claim 1 , wherein the determining the systolic duration and the diastolic duration of the heart sound signal according to the first heart sound and the second heart sound comprises:
 determining cardiac cycles comprised in the heart sound signal, and traversing each of the cardiac cycles sequentially;   using an end time of the first heart sound in the traversed cardiac cycle as a first end time, determining a next cardiac cycle corresponding to the traversed cardiac cycle, and using a start time of the first heart sound in the next cardiac cycle as a first start time;   using a start time of the second heart sound in the traversed cardiac cycle as a second start time, and using an end time of the second heart sound in the traversed cardiac cycle as a second end time;   using a time difference between the first end time and the second start time as the systolic duration;   using a time difference between the first start time and the second end time as the diastolic duration;   after each cardiac cycle is traversed, determining an average systolic duration of all the systolic durations and an average diastolic duration of all the diastolic durations; and   using the average systolic duration as the systolic duration of the heart sound signal, and using the average diastolic duration as the diastolic duration of the heart sound signal.   
     
     
         7 . A heart sound segmentation apparatus, comprising:
 a signal acquisition module, configured to synchronously collect physiological signals, wherein the physiological signals comprise heart sound signals;   a segmentation module, configured to obtain a segmentation threshold corresponding to the heart sound signal, and segment the heart sound signal based on the segmentation threshold to obtain a first heart sound and a second heart sound;   a determination module, configured to determine a systolic duration and a diastolic duration of the heart sound signal according to the first heart sound and the second heart sound.   
     
     
         8 . An electronic device, comprising:
 at least one processor; and   a memory communicatively connected to the at least one processor,   wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the heart sound segmentation method according to  claim 1 .   
     
     
         9 . A non-transitory computer-readable storage medium, characterized in that the readable storage medium is a computer-readable storage medium, and a program for implementing a heart sound segmentation method is stored on the computer-readable storage medium, and the program for implementing the heart sound segmentation method is executed by a processor to implement the heart sound segmentation method according to  claim 1 .